> On 10 Jan 2013, at 15:56 , S Ellison <S.Ellison at lgcgroup.com> wrote: > > > >> I am working with large numbers and identified that R looses >> precision for such high numbers. > Yes. R uses standard 32-bit double precision.Well, for large values of 32... such as 64. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com
On Thu, 2017-07-20 at 14:33 +0200, peter dalgaard wrote:> > On 10 Jan 2013, at 15:56 , S Ellison <S.Ellison at lgcgroup.com> wrote: > > > > > > > >> I am working with large numbers and identified that R looses > >> precision for such high numbers. > > Yes. R uses standard 32-bit double precision. > > > Well, for large values of 32... such as 64.Hmmm ... Peter, as one of your compatriots (guess who) once solemnly said to me: 2 plus 2 is never equal to 5 -- not even for large values of 2. Best wishes, Ted.
What an impressively zombified thread. Though wondering how 53 bits were supposed to fit into 32 might just warrant revivification. -- Sent from my phone. Please excuse my brevity. On July 20, 2017 5:33:34 AM PDT, peter dalgaard <pdalgd at gmail.com> wrote:> >> On 10 Jan 2013, at 15:56 , S Ellison <S.Ellison at lgcgroup.com> wrote: >> >> >> >>> I am working with large numbers and identified that R looses >>> precision for such high numbers. >> Yes. R uses standard 32-bit double precision. > > >Well, for large values of 32... such as 64.
This got revived by a long-standing bug in Mail.app on Mac: If you sort mails newest-last, it may unpredictably scroll back, often by several years. If you happen to have a large mailbox with some old unread mails in it, say from a mailing list, and don't pay attention to the date.... -pd> On 25 Jul 2017, at 07:25 , Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote: > > What an impressively zombified thread. Though wondering how 53 bits were supposed to fit into 32 might just warrant revivification. > -- > Sent from my phone. Please excuse my brevity. > > On July 20, 2017 5:33:34 AM PDT, peter dalgaard <pdalgd at gmail.com> wrote: >> >>> On 10 Jan 2013, at 15:56 , S Ellison <S.Ellison at lgcgroup.com> wrote: >>> >>> >>> >>>> I am working with large numbers and identified that R looses >>>> precision for such high numbers. >>> Yes. R uses standard 32-bit double precision. >> >> >> Well, for large values of 32... such as 64.-- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com